Improvement in polishing needles



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Letters Patent N 0.- 86,817, dated February 9, 1869i INIPRO'V'EIMENT IN-POLISHING. NEEDLES The Schedule referred to in these Letters Patent andmaking part oi the same- To all whom it may concern.-

Be it known that I, O. 0. CROSBY, of New Haven, in the county of NewHaven, and State of Connecticut, have invented a new Improvement inMachine for Polishing Needles; and I do hereby declare the following,when taken in connection with the accompanying drawings, and the lettersof reference marked thereon, to be a full, clear, and exact descriptionof the same, andwhich said drawings constitute part of thisspecification, and represent, in

Figure 1, a top view;

Figure 2, a front view;

Figure 3, a transverse section on line a at; and in Figure 4:, atransverse section through the carryingscrews, enlarged;

This invention is .designed'for polishing or finishingsewing-needles,afterthey have been tempered, the object being to avoidthe usual hand-labor, by constructing the machine so as to receive theunpolished. needles from a hopper, and rolling them over, so as to beacted upon by the polishing-cylinders, and delivering them. firom themachine polished and finished complete.

To enable others to construct and use my improvement, I will proceed todescribe the same as illustrated in the accompanying drawings.

Ais the bed-plate, upon which, in proper bearings 13, the driving-shaftO is arranged, so as to be revolved by the application of power theretoin any convenient manner. V

O is the h0pper,.itslower end or mouth, a, being of the width of thediameter of the needles to bepolished.

Beneath the said month are arranged two slides, b and d, operatedrespectively by cams, D and E, on 'thedriving-shaft, through levers band d, the said .slides being shown through the-hopper, as seen in fig.1, the hopper broken awayfor the purpose.

The lower slide 11 passes under the mouth of the hopper, so that thecolumn of needles rests thereon; then the upper slide b, which isadjusted to the proper relative position of the slide (I, so as to passin above the first needle, and between that and the second; then thelower slide d is diawnlback, and a single needle is then delivered; thenthe slide d returns beneath the hopper, the slide bis withdrawn, thecolumn of needles falls upon the lower slide, the upper slide againenters, as before, and a second needle is delivered, and so continuing,delivers a single needle at each complete operation' 'of the two slides.

Beneath the mouth of the hopper, and longitudinally aoross the machine,extend two screw-shafts, F- and H, the front, or H, :being a right-hand,and the other, or F, a left-hand screw, or may be vice versa, andarranged beneath he mouth of the hopper, so that the needles aredelivered into the thread of the screws lying at right angles to theaxis of the screws.

The said screws are arranged in a proper support, Gr,

and are caused to revolve by connection with the driving-shatt, as seenin fig. 1, so as todraw the needles delivered into the saidscrews'across the machine from the. hopper.

Near the hopper is arranged a transverse shaft, 1,

and at the other end of "the machine, a corresponding.

shaft, K, caused to revolve by worms f f on the drivlug-shaft, and uponeach shaft respectively is arranged a pulley, I and K, the said pulleysbeing-in a position central between the screws, as seen in fig. 1, and aband, L, around the said two pulleys, its lower surface lying in closeproximity to the bed or'support between the screws, as seen in 4,enlarged, and the direction of the revolution of the said pulleys beingsuch that the lower side of the band moves in the direction of thedraught of the screws, but at a velocity twice as fast as the draught ofthe screws, so that the needles rolled along by the revolving screws,and beneath the band L, (the said band I lying upon the needles,).andmoving twice as fast as the needles, the needles will, by the combinedaction of the revolving screws and moving band L, be caused to revolveor roll along upon the surface orbed between the screws. the depth ofthe thread in the screws, relativeto the bed h, or rest between thescrews, being such that the needle will rest upon the said bed, and.this bed may be of any suitable material, to prei'zeut injury to theneedles while rolling thereon. The needles are fed into the screws sothat their head-ends project upon one side, here represented as the backside. I

Upon the back side I arrange a polishing-cylinder, M, hung in a frame,N, and caused to revolve rapidly by the application of 1 power theretoin any convenient manner.

- The said cylinder'is coated with any suitable ma- I terial forpolishing-purposes, and the frame N is caused to vibrate, so as to carrythe polishing-cylinder toward and from the screws, by means of a cam, P,on a shaft,

B, through levers S and T,'(se'c figs. 1 and 3.) This vibration passesthe cylinder M over the surface of the needles, while the latter, slowlyrevolving, are polished by the polishing-cylinder M. H

In order to securely hold the needles. in their position, while.beingpolished, as well as to guide the band L, I arrange, upon the-uppersurface of the under belt, shoes 41, thesaid-shoes' being constructedwith a flange, projecting down-over each edge of the band, as seen infig. 3, and borne down by springs m with sufiicient force to sustain theneedles in their proper position, and yet so as to allow the band to bedrawn freely thereunder. The shoes also serve to guide and hold the bandin its proper path while rolling the needles. And on the frame N, in therear of the revolving cylinder, I arrange'a bar, n,which, as the frameadvances, strikes the heads of the 'needles, and forces them into aneven position,if they shall, in their transfer, have been displaced, thesaid bar being adjustable for different lengths of needles. And beneaththe needles, upon the support G, or at other convenient point, I arrangea cushion, r,-(see fig. 4,) upon which the needles bear, as thepolishing-cylinder M passes over their surface, this cushion r beingarranged upon springs s, or their equivalent, soasto be self-adjusting.3

The frame N is'supportcd in bearings B, so as to be adjusted to changethe arc of the circle through which the polishing-cylinder moves whilepassing over the needles.

Passing from under the 'first cylinder M, the needles are forcedthrough, so that their points project upon the opposite side, to be, intheir turn, polished, and are so forced by a bar, U, actuated by acam,W, arranged so as to operate against the heads, and gradually forcethe needles. through, as they advance, until, having arrived at the endof the bar U, they are forced sufficiently far through, that theremainder of the needle, not polished by the first operation, may bepolished by the second, and this is done bythearrangement of a cylinder,M, in a frame, N, in like manner as the first cylinder; the frame hungand adjusted in. like manner in its bearings R, and provided with itscushion cheneath, andlwith the shoes and adjusting-springs m, also inlike manner as-the first, the frame N being actuated by a cam, P,through levers S and T. The needles passing under the polishing-cylinderM, their point-ends are finished up to and meeting the first pol ishedsurface, and thus pass from beneath the cylinder M'complete, thencecarried on from under the band, and discharged from the machine.-

During the last polishing,'the needles are retained in position to beproperly guided, by a bar,Y, arranged in the rear of the screws, so thatthe heads bear against the said bar, as they pass along the secondpolishingcylinder.

The two cylinders may be reversed, or the needles may be polished eitherend first. I'prefer, however, the arrangement or manner of proceduredescribed.

Having thus fully described my invention,

What I claim as new and useful, anddesire to secure by Letters Patent,is

1. The arrangement of the two screws F and H, revolving toward eachother, and their axes parallel to each other,and both in same plane, soas to receive and transfer the needles, substantially in the mannerinders M, operating so as to polish the surface of the needles,substantially as described.

5. In combination with the screws F and H and band L,-the' shoes 2',arranged to bear upon the band L, and to press the latter down upon theneedles, substantially as and for the purpose specified.

6. The arrangement of the polishing-cy' linder or cylinders M andcarrying or revolving-device for the needles, with the cushion *rtosupport the needles, substantially in the manner and for the purpose setforth.

7 In combination withthe first polishing-cylinderM, the carrying andrevolving-devices for the needles, and

.the polishing-cylinder M, thebar U, arranged was to move the needles,substantially in the manner and for the purpose set forth.

8. In combination with the carrying and revolvingdevices for the needlesand the polishing-cylinder M, the bar Y, arranged so as to guide andsustain the needles, substantially in the manner and-.for the purposeset forth.

G. O. CROSBY. Witnesses:

J. H. SHUMWAY, A. J. TIBBITS.

